Unless you had no alternative, or ACTUALLY WANTED SOMETHING. Gee, I'll just live in a cardboard box hoarding my bitcoins since tomorrow they might be worth more. I guess I won't eat today anything more than cat food and out of a dumpster since I have to eat something, but the I'll save the rest for the magical day that I actually want to spend my bitcoins.
My point exactly on actually wanting something.
But let's say you have bitcoins or dollars. Bitcoins are strong and dollars are weak. Why buy your food with bitcoins? Much better to dump your dollars, until you run out.